Overview
The JLSZV(Y)9-6/10W is an outdoor stainless steel floor-mounted combined transformer designed for 6kV and 10kV medium-voltage distribution systems. It integrates current transformer (CT) and voltage transformer (PT/VT) functions in a single cast-resin insulated unit housed within a double-door stainless steel enclosure with observation windows.
This combined transformer delivers metering accuracy class 0.2S for CT and 0.2/0.5 for PT, suitable for revenue-grade active and reactive energy measurement. It complies with GB17201-2006 and is ideal for substations, industrial yards, and coastal installations requiring corrosion resistance, visual monitoring, and flexible wiring (3-phase or 3-phase 4-wire).
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| Voltage Class | 6kV / 10kV |
| Primary Current Range | 7.5A – 600A |
| CT Accuracy Class | 0.2S |
| PT Accuracy Class | 0.2 / 0.5 |
| System Frequency | 50Hz |
| Insulation Type | Cast-resin |
| Installation Type | Floor-mounted |
| Enclosure Material | Stainless steel |
| Secondary Wiring Configurations | 3-phase, 3-phase 4-wire |
| Compliance Standard | GB17201-2006 |
| Application Environment | Outdoor |
| Observation Feature | Double-door with windows |
Construction
The JLSZV(Y)9-6/10W features a robust double-door stainless steel enclosure that provides high mechanical strength and superior corrosion resistance, making it suitable for harsh outdoor environments including coastal areas. The internal core components—comprising both current and voltage transformers—are fully encapsulated in cast-resin insulation, ensuring excellent dielectric performance, moisture resistance, and long-term stability. Observation windows integrated into both doors allow visual inspection of internal meters and connections without compromising the sealed integrity of the enclosure. The floor-mounted design includes secure anchoring provisions and a dedicated secondary terminal box for safe and organized connection to energy meters and monitoring devices.
Technical Parameters
Service Conditions
- Installation position: Ground-level installation in substations, industrial yards, or distribution points
- Ambient temperature: -15°C to +55°C
- Maximum altitude: ≤ 4500m (no derating required)
- Enclosure material: Stainless steel with observation windows for visual monitoring
- Grounding: Connect grounding terminal per local electrical codes and metering standards
- Maintenance: Observation windows allow visual inspection without opening doors
Technical Parameters
The JLSZV(Y)9-6/10W is an outdoor stainless steel floor-mounted combined transformer designed for 6kV and 10kV systems. It features a cast-resin insulated voltage transformer, operates within -15°C to +55°C ambient temperature, supports altitudes up to 4500m without derating, complies with GB17201-2006, and offers a wide primary current range from 7.5A to 600A.
Voltage Transformer Data
| Type (Ratio) |
Rated Voltage (kV) |
Accuracy Class / Rated Output (VA) |
Limit Output (VA) |
Rated Insulation Level (kV) |
|---|---|---|---|---|
| JLSZV(F)-6W | 6 | 0.2 (2×20VA), 0.5 (2×50VA) | 2×400 VA | 7.2/32/60 |
| JLSZV(F)-10W | 10 | 1.0 (2×80VA), 3.0 (2×200VA) | 2×400 VA | 12/42/75 |
Current Transformer Data
| Rated Primary Current (A) |
Accuracy Class / Rated Output (VA) |
Short-Time Thermal Current (kA) |
Dynamic Current (kA) |
|---|---|---|---|
| 7.5 – 15 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 1.0 | 2.5 |
| 20 – 50 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 2.5 | 6.3 |
| 75 – 100 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 6.3 | 16 |
| 150 – 200 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 16 | 40 |
| 300 – 400 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 40 | 100 |
| 500 – 600 | 0.2S (10VA), 0.5S (10VA), 0.5 (15VA) | 60 | 150 |
Installation & Wiring
Installation Diagram
The JLSZV(Y)9-6/10W stainless steel combined transformer is installed on a flat, level surface using the mounting holes provided in the 1160mm × 1160mm footprint. The unit features a double-door front with observation windows and requires adequate clearance for ventilation on all sides, particularly at the stainless steel side panels.
Wiring Diagram
The wiring diagram illustrates connections for both 3-phase and 3-phase 4-wire configurations. Primary terminals are labeled AP1/AP2, BP1/BP2, and CP1/CP2—verify phase sequence before commissioning. The CT secondary terminals supply current input to active and reactive energy meters and must never be left open-circuited during operation. The PT secondary terminals provide voltage input to meters and monitoring devices. All grounding and meter box wiring must conform to the approved project wiring diagram, and the stainless steel enclosure must be properly grounded for safety.
Selection & FAQs
Selection Guide
- System voltage: Choose JLSZV(Y)9-6W for 6kV systems (7.2kV class) or JLSZV(Y)9-10W for 10kV systems (12kV class).
- Current transformer (CT) ratio: Select primary current from 7.5A to 600A based on actual load requirements.
- Metering accuracy: Use CT accuracy class 0.2S for high-precision revenue metering; 0.5S or 0.5 for general metering applications.
- Wiring configuration: Specify 3-phase or 3-phase 4-wire based on your network and metering setup.
- Voltage transformer (PT) ratio: Select 6000/100 for 6kV systems or 10000/100 for 10kV systems to match meter input requirements.
Frequently Asked Questions
Q1: Which accuracy class is required for revenue metering on this combined transformer?
Select the 0.2 accuracy class for revenue billing applications. It provides 2×20VA rated output for 6kV and 10kV systems per GB17201-2006. Contact our engineering team for specific burden calculations.
Q2: What are the maximum altitude and temperature limits for outdoor installation?
This floor-mounted transformer operates between -15°C and +55°C. It supports maximum altitudes up to 4500m without requiring any capacity derating. Confirm specific site conditions with our technical department.
Q3: How can maintenance personnel inspect the unit without opening the enclosure?
The stainless steel enclosure features built-in observation windows. These allow visual inspection and monitoring of the internal cast-resin components while maintaining protection. No door opening is required for basic checks.
Q4: Which international standards does this 10kV combined transformer comply with?
The unit complies with the GB17201-2006 standard. For specific IEC or other regional certification requirements, please contact our sales team for detailed compliance documentation.
Q5: Can the primary current range be customized for specific substation loads?
Yes, the standard primary current range spans from 7.5A to 600A. For non-standard current ratios or specific load requirements, subject to factory confirmation. Contact us with your load profile.
Q6: What applications are suitable for this stainless steel combined instrument transformer?
It is designed for ground-level installation in outdoor substations, industrial yards, and distribution points. It combines current and voltage transformation for 6kV and 10kV power systems.
Q7: What insulation level is provided for the 6kV voltage transformer model?
The JLSZV(F)-6W model features a rated insulation level of 7.2/32/60 kV. It utilizes cast-resin insulation for reliable outdoor performance. Request the full factory test report for detailed dielectric specifications.